<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div>块级分区标签1</div><div>块级分区标签2</div><div>块级分区标签3</div>
    <span>行内分区标签1</span><span>行内分区标签2</span><span>行内分区标签3</span>

    <div>头</div>
    <div>体</div>
    <div>脚</div>

    <header></header>
    <main></main>
    <footer></footer>
</body>
</html>